Insulator



H. E. RIDER March 8, 1927.

INSULATOR Filed Jan. 29 1925 aa v au J m; E mt Patented Mar. 8, 1927.

UNITED STATES HERBERT n. RIDER, or new YORK, N. Y.,

ASSIGNOR TO ED'XVARD L. HALL, OF NEW YORK, N. Y.

INSULATOR.

Application filed January My invention relates to radio transmission and particularly to insulators used for supporting antennae wires.

The object of my invention is to provide an improved insulator for this purpose which will be more effective in preventing leakage of electricity from the antennae by way of the insulator and antennae supporting means.

Another object of my invention is to provide a new and improved protection for the several parts of the insulator at their points of actual contact against precipitated conducting elements which causes leakage across the insulator.

Another object is to construct an insulator that can be more easily and cheaply manufactured as it is unnecessary to form holes through the body of the insulator as heretofore, to support the antennae and insulator.

Referring to the drawings which form a part of this specification,

Fig. 1 is a longitudinal side view of an insulator construction embodying my invention.

Fig. 2 is a sectional view of a portion of the insulator shown in Fi re 1.

A, indicates the body portion of the 1nsulator which may be made of any suitable material, preferably of porcelain or such material as may be cheap and easily molded.

The body portion is preferably provided with annular grooves A to increase the length of t he surface path from one end of the insulator to the other.

The ends A A'- are preferably'formed spherical as illustrated and are provided with indents B and B respectively located diametrically opposite to each other and preferably cone shaped as shown.

A slot G, extends from the bottom of each groove B B'-' to the bottom of each indent. The distance between the bottoms of the two indents which are located diametrically opposite to each other are slightly further apart than the diameter of the body portion at the bottom of the grooves.

D, indicates acrescent shaped clasp, made of metal or suitable insulating material, the

29, 1925. Serial No. 5,438.

pointed ends of which are spaced apart just enough to permit them to pass over the surface at the bottom of a groove 13 and enter the slots C, and when drawn through the slots to the bottom of the recesses B, they will be held firmly in contact with the body portion at the bottom of the indents and in swinging relation thereto, and serve as brackets to which the antenna E may be fastened at one end of the insulator and the supporting cord E at the other end, by passing them through the holes D.

It will be seen that the body portion of the insulator is suspended between the clasps and held by the sharp pointed ends thereof so that a very small area of contact occurs at the points of support and therefore the chances of leakage from the antennae to the support E is reduced to a minimum, as will be readily understood by those skilled in this art. A further advantage is gained by having the pointed ends rest in the bottoms of the indents as the said ends are better protected from rain and conducting particles carried in the atmosphere, which are deposited on the surface of the insulator and ultimately cause a leak over the insulator to the ground.

I have discovered that these slight supporting contact points provide a better protection against leakage and permits stronger and clearer signals to be received when the signals are weak, as when a station is located at a considerable distance, than can be obtained with insulators now in general use.

It is obvious from the foregoing that many modifications may be made in the size, form and composition of the insulator and brackets, and I do not wish to be limited to the specific construction shown, but may make such changes as may be desired within the spirit and scope of the invention as described.

Having thus disclosed my invention I claim as new:

An insulator comprising a body portion having an annular groove near one end thereof and detents located adjacent thereto and disposed diametrically opposite to each other, and having a slot extending from each detent to said groove, and a clasp having its ends spaced apart a distance corresponding to the diameter of said body portion at 5 the bottom of said groove and adapted to pass through said slots and rest in contact with the body portion at the bottom of said detents at a single point, said clasp adapted to serve as a bracket for the purpose set forth, and in swinging relation thereto.

Signed at New York city in the county of New York and State of New York this 28th day of January, A. D. 1925.

HERBERT E. RIDER. 

